Abbreviation for Big Freakin' Gun (and it's less polite wording). Usually an ellaborate oversized weapon with the size usually as big or bigger than the operator. They possess huge firepower but generally really cumbersome (and irreal) to wield. The term BFG was first coined in the video game "Doom"

Black thorns from which witches are born from. Once planted, they will soon form into a barrier hidden from normal sight while the witch matures. When a witch is defeated, the remaining Grief Seed may be used to restore magical power to a Soul Gem.